We study the effects of plants and root-associated fungi on wind erosion within the alpine environment of Tibet. China is one of the countries most affected by desertification processes and Tibet, in particular, a key region in desertification combat. The presented project focuses on the Barkha Plain surrounded by Mount Kailash and the Lake of Manasarovar (Ngari Prefecture). This Western Tibet region experienced little scientific attention but, nowadays, faces rapidly increasing touristic activities and expanding local settlements associated with socio-economic changes that are serious threats to the delicate ecological balance and potential triggers of desertification. It exists almost unanimous agreement that revegetation is the most efficient and promising strategy to combat wind erosion and desertification in the long term. However, re-colonising success is often poor, mainly under extreme environmental conditions. Compared to conventional practices, the approach of the presented project attains better accordance with natural succession processes and promises acceleration of both plant and soil development and, conclusively, more efficient desertification control. The project assesses the potential of native plants and symbiotic fungi to control wind erosion and desertification processes. It aims to identify key plants and fungi that increase soil aggregate stability and efficiently drive succession into a natural and self-maintaining cycle of the ecosystem. Furthermore, it provides crucial information for implementing environmentally compatible and cost-effective measures to protect high-elevation ecosystems against desertification. Within three successional stages (early, intermediate, late), field investigations are performed on the basis of Modified-Whittaker plots. Classic methods of vegetation analysis and myco-sociology are combined with analysis of distribution patterns at different scales (patchiness, connectivity). Comprehensive soil analysis is performed comprising grain size distribution, aggregate stability, pH as well as water and nutrient contents. Additionally, important parameters of wind erosion are measured concurrently and continuously to assess their magnitude and variability with respect to vegetation and soil at different levels of development. The parameters addressed, include sediment transport, air temperature, radiation, precipitation, relative humidity as well as speed and direction of wind. Surface moisture is recorded periodically and roughness described. Species and environmental parameters are checked for spatial correlation. Cutting edge technologies are applied in laboratory work, comprising molecular methods for fungal species identification and micro-tomography to analyse soil structure. Furthermore, successfully cultivated fungi and plants are subject of synthesis experiments and industrial propagation in view of practical implementation in restoration measures.
Research question: Agri-environment schemes play an increasingly important role in European CAP (Common Agricultural Policy) to support biodiversity and environment in agricultural landscapes. They have been implemented since 1992 and now cost a yearly 1.7 billion Euro. Still, there is no conclusive evidence that these schemes actually do contribute to the conservation of particularly biodiversity. The primary objective of this project is to evaluate the (cost-) effectiveness of European agri-environment schemes in protecting biodiversity and to determine the primary processes that determine their effectiveness. This project furthermore aims to determine how CAP may be introduced in candidate EU-members without unacceptable loss of biodiversity. It will provide simple guidelines how researchers, governmental authorities may efficiently evaluate agri-environmental measures. Aim: Agri-environment schemes have been used to protect biodiversity and environment in agricultural areas since 1992. Their effectiveness has never been reliably evaluated. This project aims to evaluate the (cost-)effectiveness of agri-environment schemes with respect to biodiversity conservation in five European countries. It will determine the proper scales that have to be addressed for conservation efforts for a range of species groups. It will determine the most important environmental factors that influence the effectiveness of the schemes. Based on this, recommendations will be made how the effectiveness of schemes may be improved and simple guidelines will be produced how ecological effects of agri-environment schemes can be evaluated efficiently by governmental authorities or other institutions. The ecological effects of the introduction of CAP in a candidate EU-member will be investigated to reduce negative side effects of anticipated land-use changes Scientific methods: We will examine the effectiveness of agri-environment schemes by surveying pairs of fields: a field with an agri-environment scheme and a nearby field that is conventionally managed. In five countries, in each country in three areas, and in each area on seven pairs of fields the species richness of birds, plants and three insect groups (pollinators, herbivores, predators) will be determined. Effects of schemes on pollination efficiency and pest control will be examined using indicator communities. Correlative studies will examine the effects of landscape structure, land-use intensity and species pool on the effectiveness of agri-environmental measures. The spatial scale that is relevant to nature conservation efforts will be investigated via the spatial distribution of species groups. The results will be used to formulate recommendations how to improve the effectiveness of agri-environment schemes and to construct a set of simple guidelines how schemes can be evaluated efficiently yet reliably.
The sorption of anions in geotechnical multibarrier systems of planned high level waste repositories (HLWR) and of non-ionic and organic pollutants in conventional waste disposals are in the center of recent research. In aquatic systems, persistent radionuclides such as 79Se, 99Tc, 129I exist in a form of anions. There is strongly increasing need to find materials with high sorption capacities for such pollutants. Specific requirements on barrier materials are long-term stability of adsorbent under various conditions such as T > 100 C, varying hydrostatic pressure, and the presence of competing ions. Organo-clays are capable to sorb high amounts of cations, anions and non-polar molecules simultaneously having selectivity for certain ions. This project is proposed to improve the understanding of sorption and desorption processes in organo-clays. Additionally, the modification of material properties under varying chemical and thermal conditions will be determined by performing diffusion and advection experiments. Changes by sorption and diffusion will be analyzed by determining surface charge and contact angles. Molecular simulations on models of organo-clays will be conducted in an accord with experiments with aim to understand and analyze experimental results. The computational part of the project will profit from the collaboration of German partner with the group in Vienna, which has a long standing experience in a modeling of clay minerals.
The CHAMP mission provided a great amount of geomagnetic data all over the globe from 2000 to 2010. Its dense data coverage has allowed us to build GRIMM - GFZ Reference Internal Magnetic Model - which has the highest ever resolution for the core field in both space and time. We have already modeled the fluid flow in the Earth's outer core by applying the diffusionless magnetic induction equation to the latest version of GRIMM, to find that the flow evolves on subdecadal timescales, with a remarkable correlation to the observed fluctuation of Earth rotation. These flow models corroborated the presence of six-year torsional oscillations in the outer core fluid. Torsional oscillation (TO) is a type of hydromagnetic wave, theoretically considered to form the most important element of decadal or subdecadal core dynamics. It consists of relative azimuthal rotations of rigid fluid annuli coaxial with the mantle's rotation and dynamically coupled with the mantle and inner core. In preceding works, the TOs have been studied by numerical simulations, either with full numerical dynamos, or solving eigenvalue problems ideally representing the TO system. While these studies drew insights about dynamical aspects of the modeled TOs, they did not directly take into account the observations of geomagnetic field and Earth rotation. Particularly, there have been no observation-based studies for the TO using satellite magnetic data or models. In the proposed project, we aim at revealing the subdecadal dynamics and energetics of the Earth's core-mantle system on the basis of satellite magnetic observations. To that end, we will carry out four work packages (1) to (4), for all of which we use GRIMM. (1) We perform timeseries analyses of core field and flow models, to carefully extract the signals from TOs at different latitudes. (2) We refine the conventional flow modeling scheme by parameterizing the magnetic diffusion at the core surface. Here, the diffusion term is reinstated in the magnetic induction equation, which is dynamically constrained by relating it to the Lorentz term in the Navier-stokes equation. (3) We develop a method to compute the electromagnetic core-mantle coupling torque on the core fluid annuli, whereby the energy dissipation due to the Joule heating is evaluated for each annulus. This analysis would provide insights on whether the Earth's TOs are free or forced oscillations. (4) Bringing together physical implications and computational tools obtained by (1) to (3), we finally construct a dynamical model for the Earth's TOs and core-mantle coupling such that they are consistent with GRIMM and Earth rotation observation. This modeling is unique in that the force balances concerning the TOs are investigated in time domain, as well as that the modeling also aims at improving the observation-based core flow model by considering the core dynamics.
Prehistoric pits are filled with ancient topsoil material, which has been preserved there over millennia. A characteristic of these pit fillings is that their colour is different depending on the time the soil material was relocated. Soil colour is the result of soil forming processes and soil properties, and it could therefore indicate the soil characteristics present during that specific period. To the best of our knowledge, no investigation analysed and explained the reasons for these soil colour changes over time. The proposed project will investigate soil parameters from pit fillings of different archaeological periods in the loess area of the Lower Rhine Basin (NW-Germany). It aims to implement the measurement of colour spectra as a novel analytical tool for the rapid analyses of a high number of soil samples: the main goal is to relate highresolution colour data measured by a spectrophotometer to soil parameters that were analysed by conventional pedogenic methods and by mid infrared spectroscopy (MIRS), with a main focus on charred organic matter (BPCAs). This tool would enable us to quantify the variation of soil properties over a timescale of several millennia, during different prehistoric periods at regional scale and for loess soils in general. Detailed information concerning changing soil properties on a regional scale is necessary to determine past soil quality and it helps to increase our understanding of prehistoric soil cultivation practices. Furthermore, these information could also help to increase our understanding about agricultural systems in different archaeological periods.
Waterborne sewage system has proven to be inappropriate to solve sanitation needs in developing countries. Approximately 90 percentt of city sewage in developing countries today is discharged untreated, polluting rivers, lakes and coastal areas (Winblad, 1997). With increasing population density and the resultant groundwater pollution, conventional decentralized disposal systems such as latrines and seepage pits are not viable alternatives either. Many cities are short of water and subject to critical environmental degradation (Niemczynowicz, 1996). Conventional sanitation technologies based on flush toilets, sewers, treatment and discharge cannot solve the problems in urban areas anymore. A sustainable sanitation and wastewater management system is urgently needed in order to address these issues. Ecological sanitation (Ecosan) is proposed as an alternative system to solve the following problems: lack of sanitation and water body contamination by pathogens from human waste. Ecosan does not only provide sanitation facilities for the people, but also seeks to protect public health, prevents water pollution and at the same time returns valuable nutrients to the soil so that it also helps to ensure food security and contributes to the objectives of sustainable development. The objective of this research is to search for a sustainable sanitation and human waste management system that is appropriate to be applied in poor income people living in densely populated urban areas in Indonesia. As Ecological Sanitation has not been applied in Indonesia before, this dissertation also aims to investigate its effectiveness and community acceptance in Indonesia. Two other existing systems are also studied as the comparison, which are the conventional septic tank system and the decentralized wastewater system (Dewats). All of these sanitation systems are assessed based on three sustainability criteria: economical, environmental and social.
The adoption of the Urban Waste Water Treatment Directive 91/271/EEC imposes the sewage sludge to be subsequently treated so it is expected by 2005 to increase twofold in comparison whit 1992. However, classical incineration to treat this vast amount of sludge must be no longer accepted from an environmental point of view. In addition, the Sewage Sludge Directive 86/278/EEC regulates the uses and properties of stabilised sludge for being either recycled or disposed. Both directives drive specific actions in two complementary ways. Firstly, a deep knowledge of current sludge treatment, such as mesophilic, thermophilic or autothermophilic processes, must be promoted to solve that problem in the UE ambit, taking in account the particular considerations of each treatment facility. In second place, the development of new processes must be supported to open new alternatives that could valorise that waste.The proposal aims at developing strategies for the disposal and reuse of waste sludge. The scope envisages to develop several processes for reducing both amount and toxicity of sludge, with simultaneous transformation into green energy vectors such as methane or hydrogen. In outline, mesophilic and mainly thermophilic and autothermophilic conditions will be deeply explored as classical alternatives for sludge stabilisation, assuring sanitary conditions of the treated sludge. Also, valuable materials will be obtained from sludge, such as activated carbons, which will be used in conventional adsorption processes and in innovative advanced oxidation processes.The main outcomes expected at the end of the projects are guidelines for technology selection in agreement with the geographic, economic and technical characteristics of the sewage plants, demonstration of the feasibility of new applications for the sewage sludge, manufacturing of activated carbon from sludge sewage as innovative recycling of sludge waste, and a deep understanding of the methods involved. Prime Contractor: Universitat Rovira i Virgili, Tarragona, Spain.
Derzeit werden verschmutzte Fassaden meist mit Strahlverfahren gereinigt, bei denen entweder Wasser oder Gemische aus Wasser, Luft und festen Strahlmitteln eingesetzt werden. In Spezialfällen (z.B. bei der Graffitientfernung) werden auch toxikologisch und ökologisch nachteilige organische Lösemittel eingesetzt, wobei aufwändige Zusatzmaßnahmen des Arbeits- und Umweltschutzes erforderlich sind. Ein Nachteil der praxisüblichen wässrigen Strahlverfahren sind die hohen Personal- und Betriebskosten. Derartige Verfahren erfordern hohe Wassermengen, so dass in großem Umfang schadstoffbelastete Abwässer resultieren. Diese dürfen aufgrund der umweltrechtlichen Vorschriften nicht unaufbereitet in die Kanalisation bzw. in die Oberflächengewässer geleitet werden, sondern müssen je nach Schadstoffbelastung zusammen mit den eingesetzten Strahlmitteln aufwändig und zu hohen Kosten aufgefangen und aufbereitet bzw. entsorgt werden. Ferner führt der Einsatz wasserintensiver Fassaden-Reinigungs-verfahren je nach Porosität der Materialien zu starker Durchfeuchtung mit entsprechenden Folgeschäden. Darüber hinaus kann trotz der möglichen Anpassung der Strahlwirkung an Untergrund und Anschmutzung eine Materialschädigung der zu reinigenden Oberfläche durch Abrasion nicht vollständig verhindert werden. Eine Alternative zu den genannten Reinigungsverfahren bietet die Plasmatechnologie. Wie im abgeschlossenen Forschungsprojekt gezeigt, können typische Fassadenmaterialien, wie Klinker, Sandstein, Feinsteinzeug, Marmor, Granit, Eloxal und Edelstahl mit kaltem Atmosphärendruckplasma gereinigt werden. Ein mobiles Abwasser- und chemikalienfreies Reinigungsverfahren, das zugleich materialschonend ist, wurde hiermit entwickelt. Als typische Anschmutzungen wurden Graffitianschmutzungen (Acryl- und Kunstharzlacke) und künstliche Atmosphärenschmutze eingesetzt. Die angeschmutzten Proben wurden einer definierten Bewitterung (abwechselnde UV- Bestrahlung und Betauung) für 30 Tage ausgesetzt. Zur Erzielung einer guten Reinigungswirkung mittels Plasma wurden verschiedene Prozessgase (Druckluft, Argon, Stickstoff) eingesetzt und Prozessparameter variiert, darunter Düsengeometrie, Abstand Düse-Substrat, Vorschubgeschwindigkeit und Anzahl der Überfahrten. Bei Anwendung von Druckluft als Prozessgas wurde unter Einsatz eines hochenergetischen Druckluft-Plasmastrahls unter bestimmten Verfahrensbedingungen ein effektiver Abtrag von schwarzem, grünem und rotem Acryl- und Kunstharzlack, aber auch von Algen und Pilzen von bis zu 100% erreicht. Weißer und silbernen Acryllack konnten hingegen nur zu maximal 70% entfernt werden. Die untersuchten Materialien wurde dabei sowohl mechanisch als auch thermisch nicht geschädigt. Während der Plasmabehandlung wurden relativ niedrige Oberflächentemperaturen von 60 bis 80°C für mineralische bzw. 70° bis 115°C für metallische Substrate gemessen usw
BOmobil - so heißt der Elektrokleintransporter, den die Hochschule Bochum mit den Partnern Composite Impulse, Delphi, Scienlab, den Stadtwerken Bochum und dem TÜV NORD, gefördert im Rahmen des Wettbewerbs ElektroMobil.NRW serienreif entwickelt. Die Anforderungen von klein- und mittelständigen Unternehmen für den Regionalverkehr der Zukunft bestimmen das Konzept. Elektromobilitat und ansprechendes Design müssen sich nicht ausschließen, das beweist das BOmobil. Technologisch zeigt der Prototyp eine radikale Abwendung von herkömmlichen Automobilkonzepten: keine zentrale Antriebseinheit mehr - stattdessen Radnabenmotoren. So entsteht Raum für die Neugestaltung des Innenraums. Zwei Sitzplätze, Platz für eine Normgitterbox, Höchstgeschwindigkeit ca. 130 km/h, Reichweite mehr als 150 Kilometer - Elektromobilität für den Alltag. Alle Komponenten des elektrischen Antriebsstrangs werden im sogenannten Skateboard untergebracht, der tragenden Struktur, die aus Aluminium-Leichtbau-Profilen genietet und geklebt wird. Diese Variante des Aufbaus ermöglicht eine hochfeste Struktur, die für einen Kleintransporter die nötige Crash-Sicherheit bietet und flexible Aufbauvarianten zulässt. Die Batterie, die Traktionswechselrichter und die Motoren sind organisch zueinander angeordnet. So lassen sich kurze Leitungswege und ein niedriger Schwerpunkt realisieren. Durch die selbst entwickelten Radnabenmotoren wird das Antriebsmoment dort generiert, wo es benötigt wird und die eingesparte Antriebseinheit im Aufbau vergrößert das Ladevolumen des Fahrzeugs. Für die Batterie kommt die Lithium-Eisen-Phosphat-Technologie zum Einsatz. Das nötige enge Temperaturband für deren Betrieb wird im Rahmen des Thermomanagement des Fahrzeuges realisiert. Die Auswahl geeigneter thermisch isolierender Karosserie- und Scheibenwerkstoffe ist dabei von zentraler Bedeutung, um eine aktive Kühlung bzw. Heizung in deutlich geringerem Maße als in konventionellen Fahrzeugen erforderlich zu machen. Die Karosserie wird aus ABS-Kunststoff und Faserverbund-Kunststoff gefertigt. Die Kunststoffbauteile haben sowohl strukturelle, als auch warme- und geräuschdämmende Funktion. Während in konventionellen Fahrzeugen Einscheiben-Sicherheits- und Verbundglas eingesetzt wird, erfolgt im BOmobil soweit möglich die Verwendung von Kunststoffscheiben. Zur Kostenreduktion werden für das Fahrwerk Standardkomponenten des OPEL Zafira verwendet.
The baking industry includes companies that make value added products including bread, buns, rolls, doughs, desserts, crusts, pastas, cookies, biscuits, crackers etc. that are either baked or frozen. The use of refrigeration technology has made a bakery's location independent of its customers, thereby broadening the geographic market potential and contributing to the growth of this sector. However, this development does have a cost. Bakeries are energy intensive, using large amounts of electricity and natural gas to operate the refrigeration system, compressed air system and ovens. These energy costs are rising and becoming a significant portion of the ingredient costs of baked goods. About 10Prozent of the total electrical and thermal energy consumption of all craft enterprises originates from the bakery sector. Accordingly there are many possibilities for energy reduction and therefore to permanently reduce the costs for the enterprises and thus to make a sustainable contribution to climate protection. Making changes in the energy use patterns of bakeries would be the fastest way to affect the energy profile of bread, because bakery is responsible for 70 and 80Prozent of the total energy consumption in conventional and organic bread production, respectively. Overall aim of the NanoBAK-Collaborative Project is the efficient energy management in the baking industry. Specific aim of this project is the development and demonstration of a novel marketable climatic chamber with an innovative, energy-saving nano-aerosol humidification system. Lab tests have shown that the energy consumption using ultrasonic humidification is significantly lower than for conventional humidification. The innovative ultrasonic humidification of the NanoBAK Project saves up to 50Prozent of energy compared to conventional humidifiers. Furthermore the quality of the bakery goods is of high value, so that the ultrasonic humidifier is profitable both energetically and qualitative.
| Organisation | Count |
|---|---|
| Bund | 76 |
| Europa | 2 |
| Land | 1 |
| Wissenschaft | 35 |
| Zivilgesellschaft | 2 |
| Type | Count |
|---|---|
| Förderprogramm | 76 |
| License | Count |
|---|---|
| Offen | 76 |
| Language | Count |
|---|---|
| Deutsch | 24 |
| Englisch | 73 |
| Resource type | Count |
|---|---|
| Keine | 57 |
| Webseite | 19 |
| Topic | Count |
|---|---|
| Boden | 69 |
| Lebewesen und Lebensräume | 76 |
| Luft | 56 |
| Mensch und Umwelt | 76 |
| Wasser | 52 |
| Weitere | 76 |